Class AvfBackend

rustcv-camera/src/backend/macos/mod.rs:91–102

macOS AVFoundation camera backend. macOS AVFoundation 摄像头后端。

/// macOS AVFoundation camera backend.
/// macOS AVFoundation 摄像头后端。
pub(crate) struct AvfBackend {
    /// Opaque handle to the ObjC session.  `null` before `open()`.
    /// ObjC 会话的不透明句柄。`open()` 前为 null。
    cam: *mut sys::AvfCameraOpaque,

    /// Owned buffer for the current frame's BGRA32 pixel data.
    /// Borrowed by the `RawFrame<'_>` returned from `dequeue()`.
    ///
    /// 当前帧 BGRA32 像素数据的所有缓冲区。
    /// 由 `dequeue()` 返回的 `RawFrame<'_>` 借用。
    frame_buf: Vec<u8>,
}

/// # Safety
/// `cam` is an opaque C pointer accessed only from one thread at a time.